C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/108
C07D 501/18 (2006.01) A61K 31/545 (2006.01) C07D 501/00 (2006.01) C07D 501/04 (2006.01) C07D 501/36 (2006.01) C07D 501/38 (2006.01) C07D 501/48 (2006.01)
Patent
CA 1282408
Abstract Processes for the preparation of stable, crystalline cephalosporin intermediates of the formula Image and Image wherein X is HI or HC1, and Nu and Nu ? are certain N-containing heterocyclic rings attached via a sulfur atom or a ring nitrogen atom, respectively, which are substantially free of the .DELTA.2 isomer; processes for intermediates in the preparation of the above compounds; and processes for the preparation of broad-spectrum cephalosporin antibiotics.
516259
Brodfuehrer Paul Raymond
Brundidge Steven Peter
Sapino Chet Jr.
Shih Kun Mao
Walker Donald Gilmore
Bristol-Myers Squibb Company
Gowling Lafleur Henderson Llp
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